Synthesis of zeolite Beta containing ultra-small CoO particles for ethylbenzene oxidation

doi:10.1016/S1872-2067(17)62853-5

Chinese Journal of Catalysis ›› 2017, Vol. 38 ›› Issue (7): 1207-1215.DOI: 10.1016/S1872-2067(17)62853-5

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Synthesis of zeolite Beta containing ultra-small CoO particles for ethylbenzene oxidation

Guanqun Zhang^a,d, Donge Wang^a, Pei Feng^b,d, Song Shi^c, Congxin Wang^a, Anda Zheng^a,d, Guang Lü^a,d, Zhijian Tian^a

a Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China;
b State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China;
c State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, Dalian 116023, Liaoning, China;
d University of Chinese Academy of Sciences, Beijing 100049, China

Online:2017-07-18 Published:2017-06-27
Contact: 10.1016/S1872-2067(17)62853-5
Supported by:
This work is supported by Strategic Priority Research Program of the Chinese Academy of Sciences (XDA07020300).

Abstract

Abstract:

Zeolite Beta containing ultra-small CoO particles was synthesized from a one-step hydrothermal process. The synthesis route involves the pre-mixture of hydrofluoric acid with tetraethylammo-nium hydroxide (in a molar ratio of 1.3-1.5:1) before the addition of a silicon and cobalt source. Investigations by scanning electron microscopy, X-ray diffraction, UV-Vis spectroscopy, X-ray pho-toelectron spectroscopy, H₂-temperature-programmed reduction and transmission electron mi-croscopy confirm the presence of ultra-small CoO particles in the zeolite Beta structure. The ul-tra-small CoO particles in zeolite Beta present high stability against both oxidation and reduction atmospheres at high temperatures. The catalytic performance of the CoO-containing zeolite Beta catalysts was compared with other Co-containing zeolites by evaluating ethylbenzene oxidation reactivity. The CoO-containing zeolite Beta exhibits high ethylbenzene conversion and high selectiv-ity to acetophenone and 1-phenylethanol. The high activity of this catalyst system can be attributed to the high dispersion of the ultra-small CoO particles in the Beta structure.

Key words: Beta zeolite, Cobalt monoxide, Ultra-small CoO particle, Ethylbenzene oxidation

Guanqun Zhang, Donge Wang, Pei Feng, Song Shi, Congxin Wang, Anda Zheng, Guang Lü, Zhijian Tian. Synthesis of zeolite Beta containing ultra-small CoO particles for ethylbenzene oxidation[J]. Chinese Journal of Catalysis, 2017, 38(7): 1207-1215.

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Synthesis of zeolite Beta containing ultra-small CoO particles for ethylbenzene oxidation

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